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Found: Ice From 2.7 Million Years Ago

In an Antarctic ice core, made using a new strategy, scientists have found ice and bubbles of air that are 2.7 million years old. That’s astonishingly old ice, but it’s also dramatically older than any other pieces of ice humans have found before. Before this, the oldest ice we’ve ever found was one million years old. What was the air like 2.7 million years ago? As Science News reports, the carbon dioxide levels in the air bubble samples was less than 300 parts per million, far lower than today’s rising carbon levels.
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